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【结 构 式】

【分子编号】11782

【品名】2-Methyl-1-nitropropane

【CA登记号】

【 分 子 式 】C4H9NO2

【 分 子 量 】103.121

【元素组成】C 46.59% H 8.8% N 13.58% O 31.03%

与该中间体有关的原料药合成路线共 2 条

合成路线1

该中间体在本合成路线中的序号:(IV)

The synthetic sequence used for the manufacture of ICI 200,880 is as follows: Carbodiimide-mediated coupling of acid (I) with amine (II) followed by ester hydrolysis with HCl affords acid (III). The other key intermediate, amino alcohol (VI), is prepared via alkylation of nitro-alkane (IV) with trifluoroacetaldehyde followed by reduction of the resulting nitro alcohol (V). Coupling of acid (III) with amino alcohol (VI) followed by oxidation with KMnO4 affords ICI 200,880. Since ICI 200,880 is an amorphous solid, it cannot be purified by crystallization. However, when acid (III) is purified by crystallization as its calcium salt and amino alcohol (VI) is purified by flash distillation, then the final coupling and oxidation proceed to yield ICI 200,880 of excellent purity.

1 Edwards, P.D.; ICI 200880. Drugs Fut 1995, 20, 7, 662.
2 Bergeson, S.H.; Schwartz, J.A.; Stein, M.M.; Wildonger, R.A.; Edwards, P.D.; Shaw, A.; Trainor, D.A.; Wolanin, D.J. (AstraZeneca LP); Peptide derivs. AU 8652623; EP 0189305; ES 8706169; ES 8707551; ES 8802526; JP 1986218518; JP 1993246984; US 4910190; US 5055450; US 5194588 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 11780 4-([[(4-Chlorophenyl)sulfonyl]amino]carbonyl)benzoic acid C14H10ClNO5S 详情 详情
(III) 11781 (2S)-1-((2S)-2-[[4-([[(4-Chlorophenyl)sulfonyl]amino]carbonyl)benzoyl]amino]-3-methylbutanoyl)-2-pyrrolidinecarboxylic acid C24H26ClN3O7S 详情 详情
(IV) 11782 2-Methyl-1-nitropropane C4H9NO2 详情 详情
(V) 11783 1,1,1-Trifluoro-4-methyl-3-nitro-2-pentanol C6H10F3NO3 详情 详情
(VI) 11784 3-Amino-1,1,1-trifluoro-4-methyl-2-pentanol C6H10F3NO3 详情 详情
(VII) 11785 (2S)-1-((2S)-2-[[4-([[(4-Chlorophenyl)sulfonyl]amino]carbonyl)benzoyl]amino]-3-methylbutanoyl)-N-(3,3,3-trifluoro-2-hydroxy-1-isopropylpropyl)-2-pyrrolidinecarboxamide C30H36ClF3N4O7S 详情 详情

合成路线2

该中间体在本合成路线中的序号:(XI)

An alternative synthesis has been reported employing pure (2R,3S)-aminoalcohol (XVII). Treatment of isobutyl iodide (X) with sodium nitrite in the presence of urea in DMF afforded 2-methyl-1-nitropropane (XI). Further condensation of fluoral hydrate (XII) with this nitrocompound using K2CO3 provided a diastereomeric mixture of nitroalcohols (XIII). Fractional crystallization from pentane yielded the racemic threo-nitroalcohol (XIV), which was converted to the alredy reported racemic threo-aminoalcohol (VII) by catalytic hydrogenation. This compound (VII) was treated with triphosgene and NaOH to produce oxazolidone (XV). After conversion of (XV) to the corresponding lithium salt with BuLi at -70 C, its condensation with (-)-menthyl chloroformate gave a diastereomeric mixture of carbamates, from which the desired isomer (XVI) was isolated by fractional crystallization from ether/hexane. The chiral auxiliary and the oxazolidone ring were then cleaved by hydrolysis with KOH yielding the (2R,3S)-aminoalcohol (XVII)(1). The coupling of (XVII) with the amino protected dipeptide (XVIII) (obtained by treatment of peptide (I) with trifluoroacetic acid) afforded dipeptide amide (XIX), The N-(benzyloxycarbonyl) protecting group of (XIX) was subsequently removed by catalytic hydrogenation, and the resulting amino compound was condensed with anisoyl chloride (III) to furnish the anisoyl dipeptide (XX). Finally, oxidation of the alcohol group of (XX) using the modified Pfitner-Moffat procedure produced some epimerization of the resulting ketone, the oxidation with KMnO4 in the presence of NaOH yielded the target S,S,S-peptide.

1 Bohnert, C.M.; Bernstein, P.R.; Veale, C.A.; et al.; Orally active trifluoromethyl ketone inhibitors of. J Med Chem 1997, 40, 20, 3173.
2 Pegg, S.J.; Sependa, G.J.; Davies, E.P.; Veale, C.A. (AstraZeneca plc); Diastereomeric pure trifluoromethyl ketone peptide. EP 0743953; JP 1997508902; US 5739157; US 6037363; WO 9521855 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 22770 tert-butyl (2S)-1-((2S)-2-[[(benzyloxy)carbonyl]amino]-3-methylbutanoyl)-2-pyrrolidinecarboxylate C22H32N2O5 详情 详情
(III) 22671 4-Methoxybenzoyl chloride; p-Methoxybenzoyl chloride; 4-Anisoyl chloride 100-07-2 C8H7ClO2 详情 详情
(VII) 22776 (2R,3S)-3-amino-1,1,1-trifluoro-4-methyl-2-pentanol C6H12F3NO 详情 详情
(X) 18168 1-iodo-2-methylpropane 513-38-2 C4H9I 详情 详情
(XI) 11782 2-Methyl-1-nitropropane C4H9NO2 详情 详情
(XII) 22781 2,2,2-trifluoro-1,1-ethanediol 421-53-4 C2H3F3O2 详情 详情
(XIII) 11783 1,1,1-Trifluoro-4-methyl-3-nitro-2-pentanol C6H10F3NO3 详情 详情
(XIV) 22783 (2R,3S)-1,1,1-trifluoro-4-methyl-3-nitro-2-pentanol C6H10F3NO3 详情 详情
(XV) 22784 (4S,5R)-4-isopropyl-5-(trifluoromethyl)-1,3-oxazolidin-2-one C7H10F3NO2 详情 详情
(XVI) 22785 (1R,2S,5R)-2-isopropyl-5-methylcyclohexyl (4S,5R)-4-isopropyl-2-oxo-5-(trifluoromethyl)-1,3-oxazolidine-3-carboxylate C18H28F3NO4 详情 详情
(XVII) 22776 (2R,3S)-3-amino-1,1,1-trifluoro-4-methyl-2-pentanol C6H12F3NO 详情 详情
(XVIII) 22787 (2S)-1-((2S)-2-[[(benzyloxy)carbonyl]amino]-3-methylbutanoyl)-2-pyrrolidinecarboxylic acid C18H24N2O5 详情 详情
(XIX) 22788 benzyl (1S)-2-methyl-1-[[(2S)-2-([[(1S,2R)-3,3,3-trifluoro-2-hydroxy-1-isopropylpropyl]amino]carbonyl)pyrrolidinyl]carbonyl]propylcarbamate C24H34F3N3O5 详情 详情
(XX) 22789 (2S)-1-[(2S)-2-[(4-methoxybenzoyl)amino]-3-methylbutanoyl]-N-[(1S,2R)-3,3,3-trifluoro-2-hydroxy-1-isopropylpropyl]-2-pyrrolidinecarboxamide C24H34F3N3O5 详情 详情
Extended Information